کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1626103 | 1516440 | 2007 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Growth, crystal structure and thermal properties of calcium bis(malate) dihydrate
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
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چکیده انگلیسی
A new coordination compound crystal of calcium with malic acid is prepared by gel aided solution growth. Single crystal X-ray diffraction studies revealed that the structural formula of the compound is Ca(C4H4O5)2·2H2O. It crystallizes in the monoclinic system with space group C2/c, Z = 4, with unit cell parameters a = 15.916(9) Ã
, b = 5.886(3) Ã
, c = 13.046(6) Ã
and β = 90.678(4)°. Data were collected by oscillation method and full-matrix least squares refinement was applied to the model converging to final R indices R1 = 0.0416 and ÏR2 = 0.1255. Compound forms a layer-type polymeric structure, stabilized by intermolecular hydrogen bonding. Ca2+ is eight-fold coordinated. Malate is coordinated to Ca2+ tridendate-bidendate through two carboxylates and monodendate through oxygen atom of the hydroxyl group. Thermal behavior investigated using TG and DTA studies is in conformity with the proposed structure.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 433, Issues 1â2, 16 May 2007, Pages 211-215
Journal: Journal of Alloys and Compounds - Volume 433, Issues 1â2, 16 May 2007, Pages 211-215
نویسندگان
T. Jini, K.V. Saban, G. Varghese, S. Naveen, M.A. Sridhar, J.S. Prasad,